"I totally support LeAnn's decision to enter rehab -- my top priority is my children, and at the end of the day we are a family," Glanville said in a statement in an exclusive statement to Us on Thursday. "LeAnn is their stepmom, and they love her. I am wishing her all the best and I hope she will find what she is looking for while in rehab."

The 39-year-old "Real Housewives of Beverly Hills" star was blindsided in 2009 when Us broke the news of Cibrian's affair with Rimes, his costar in the TV movie "Northern Lights." Rimes was married to chef Dean Sheremet at the time. Glanville and Cibrian have two sons together, Mason, 9, and Jake, 5.

After both Cibrian and Rimes' marriages collapsed, Rimes and the actor tied the knot in April 2011. "She has a lot of mental anguish over how she is perceived," a source told Us of Rimes. "[She has] this constant feeling of being punished for something. She feels like society has never forgiven her. She has this overwhelming need to be loved and respected."